Lets face it. The only reason you’re going to want Kastor is so that you can breed other dragons. He’s a common dragon, so weak. He has lockdown, which isn’t really that useful as he often dies before applying it.
You’re probably going to be breeding Kastor using a combo of either Leviathan and Hext or Hext and Aetrix.
Maximum Attack: 4,278
Maximum Health: 19,037
A guide to using Kastor